items

engine/items/carried.go

@@ -1,6 +1,9 @@
 package items
 
-import "lab.zaar.be/thefish/alchemyst-go/engine/ecs"
+import (
+	"lab.zaar.be/thefish/alchemyst-go/engine/ecs"
+	"lab.zaar.be/thefish/alchemyst-go/engine/types"
+)
 
 type CarriedFace interface {
 	Drop()
@@ -12,16 +15,74 @@ type Carried struct {
 	Bulk int //внешний размер, см3
 }
 
-func (c *Carried) Type() string {
+func (c Carried) Type() string {
 	return ecs.CarriedComponent
 }
 
-func (c *Carried) Pickup() {}
-func (c *Carried) Drop() {}
+func (c Carried) Pickup(who, what ecs.Entity) {
+	// check if im lying on ground
+	if !Controller.HasComponent(what, ecs.CoordsComponent) {
+		return
+	}
+	// something inexistent on map trying to pickup an item?!
+	if !Controller.HasComponent(who, ecs.CoordsComponent) {
+		//todo log error - investigate this situation
+		return
+	}
+	//check if who and what are on the same tile
+	whoCoords := Controller.GetComponent(who, ecs.CoordsComponent).(types.Coords)
+	whatCoords := Controller.GetComponent(what, ecs.CoordsComponent).(types.Coords)
+	if whoCoords != whatCoords {
+		//todo log error - something strange happened
+		return
+	}
+	//does not have inventory?
+	if !Controller.HasComponent(who, ecs.BackpackComponent) {
+		//todo send message - you cant carry items
+		return
+	}
+	bp := Controller.GetComponent(who, Backpack{}.Type()).(Backpack)
+	if !bp.HasFreeSpace(c.Bulk, c.Mass) {
+		//todo send message - does not fit to your inventory
+		return
+	}
+	//do not remove appearance
+	//remove coords instead (does not exist on map anymore)
+	Controller.RemoveComponent(what, ecs.CoordsComponent)
+	bp.items = append(bp.items, what)
+}
 
-func (c *Carried) GetMass() int {
+func (c Carried) Drop(who, what ecs.Entity) {
+	var coords types.Coords
+	// something inexistent on map trying to drop an item?!
+	if !Controller.HasComponent(who, ecs.CoordsComponent) {
+		//todo log error - investigate this situation
+		return
+	} else {
+		coords = Controller.GetComponent(who, types.Coords{}.Type()).(types.Coords)
+	}
+	//does not have inventory?
+	if !Controller.HasComponent(who, ecs.BackpackComponent) {
+		//todo send message - you cant carry items
+		return
+	}
+
+	bp := Controller.GetComponent(who, Backpack{}.Type()).(Backpack)
+	var dropped ecs.Entity
+	bp.items, dropped = ecs.DeleteFromEntitySlice(bp.items, what)
+	if dropped != what {
+		//todo log error - something strange happened
+		return
+	}
+	//Give dropped back coordinated
+	Controller.AddComponent(dropped, coords)
+	//Controller.UpdateComponent(what, coords.Type(), coords) //even we need that?
+	Controller.UpdateComponent(who, bp.Type(), bp)
+}
+
+func (c Carried) GetMass(what ecs.Entity) int {
 	return c.Mass
 }
-func (c *Carried) GetBulk() int {
+func (c *Carried) GetBulk(what ecs.Entity) int {
 	return c.Bulk
 }